I'm not sure that the causal arrow for the anti-vaxxers runs through Trump. He did, after all, get vaccinated. The rhetoric on that one largely came out of Fox. Now, if you want to talk about Trump and pandemic minimization, I'm all ears.
By and large, the bluest states were the ones with the highest vaccination rates pre-pandemic, if you look at the data for, say, MMR. IMO, the yoga-pants types got airtime specifically because they were newsworthy - they were the sort of people that, all else equal, one would expect to have vaccinated kids. There are exceptions (NJ, WA), but in general there was a fairly strong correlation between low poverty + high education levels -> high vaccination rates.